Summary statistics for a8_c2_12 variable in hosp_rollup2552_96_1997 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a8_c2_12 | 5,897 -1526265 3827067 -1.27e+08 -3 by Jean Roth , jroth@nber.org , 5 Sep 2018